In all the world, Caiz (Caiz 
) is an extremely rare boy's forename. More prevalently, Caiz is the last name as well as the forename.
Eva, Armando, Cecilia, Rogerio, Ricardo, Rutilio, Leonila, Luciano, Luisito, Tomáš, Edilene, Izidora, Agustina, Rose Ann, Gregorio, Jonathan, Elenilda, Elizabeth, Francisco, Francis Ian, Isabel, Emilio, Nelida, Gloria, Adao, Raul, Rick, Jose, Juan, Maria, Mario, Carla, Celia, Mark Anthony, Pedro, David, Lucas, Luisa, Marlyn, Mireya, Miguel, Silvia, Sergio, Angela, Primy, and José Antonio